Coupling device



FIG. 1 is a top plan view;

FIG. 2 is a front view;

FIG. 3 is a back view;

FIG. 4 is a left side view;

FIG. 5 is a right side view;

FIG. 6 is a perspective view; and,

FIG. 7 is a reference drawing showing the condition of use.

The broken line showing of a photoelectric conversion connector is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for coupling device, as shown and described. 